Tony winced as her nails bit into his leg, making him surge up off of the pillow and sit upright. Poor thing, it was just killing her right now, so he ran a loving caress down her back as he gave her a kiss before obliging her. It took some maneuvering, but her turned around underneath her and used the headboard to give his feet leverage and push himself all the way down to her lower half where he could see Kirk's tongue dipping in and out of Remy's ass. Fuck, even he had to admit how hot it looked.
Her ass was already poking up so high in air, but he propped himself up on one arm and touched the tip of his tongue to her clit. God, she was already so wet that it was already coating her nicely, so he dragged his tongue up and down her folds, lapping at the wetness before he pushed his tongue between them and inside of her. Kirk and Tony had almost timed their tongues to fuck each hole at the same time, though not purposefully.
After a minute, Tony moved his mouth lower on her to suck her clit, tongue encircling and flicking across it, as he pushed two fingers inside her pussy just as Kirk was pouring a little lube on her ass and his fingers, lubing them both up as he ran the tips around the rim before pushing two into her, breaching the tight ring.
"You're bit tight back here, love. Iron Man hasn't been plowing you?" Kirk's voice, thick with lust, broke through the near silence of the room as he started to pump his fingers in and out of her faster. Tony would have frowned at that, given that Kirk didn't know him and his wife had had so much emotional trouble in the last months that they'd barely touched each other, but he was too busy burying his face in her pussy and making her come was more important to him than anything Kirk was saying.